Q22 of 32 Page 46

What is the rate of simple interest per annum, when the interest of some money in 10yrs. will be part of its amount (principal along with interest)-Let us determine it.

Say rate of simple interest per annum is ‘r’


Given: Interest of some money will be


Let’s Principal be ‘P’


⇒ Interest =


P = P, r = r, t = 10 years and I =


Since,




⇒ r = 4%


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